S236DLUDSFFZA1 – Galaxy A23 5G firmware
Build S236DLUDSFFZA1 is a security update for the Galaxy A23 5G (SM-S236DL)
on Android 14 (One UI 6). It first appeared on Samsung's servers on Jan 27, 2026 (method) and has reached
1 region so far. It raises the bootloader bit from 14 to 15: once installed, the device no longer accepts firmware with bit 14 or lower, so a downgrade to S236DLUDSEFYJ2 is blocked. Samsung still serves this file.
- Model
- SM-S236DL
- Android
- Android 14
- Type
- Security
- Bootloader bit
- 15
- First released
- Jan 27, 2026
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received S236DLUDSFFZA1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
TFN | USA (TracFone) | Jan 27, 2026 | day 0 | S236DLUDSFFZA1/S236DLTFNFFZA1/S236DLUDSFFZA1 |
Download and release notes
samloader download -m SM-S236DL -r TFN -v S236DLUDSFFZA1/S236DLTFNFFZA1/S236DLUDSFFZA1Samsung's release notes and security patch level for this update: SM-S236DL / TFN on doc.samsungmobile.com. What each part of the build number means: decode S236DLUDSFFZA1.